Power-transmitting mechanism.



P, BUGHERER. PQ-W TRAISKIT'lHlE MEGHQIQM. APPLICATION FILED HOV.22;1907.

910,901. Patented Jan. 26, 1909.

1 Y/// All 2% 5 Qlllllllllllll- Inventor:

FREDERICK BUGHERER, OF BAYONNE, NEW JERSEY.

POWER-TRANSMITTING MECHANISM.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed November 22, 1907. Serial No. 403,277.

To all whom it may concern:

Be it known that I, FREDERICK BUCHERER, a citizen of the United States,residing at Bayonne, in the county of Hudson and State of New Jersey,have invented certain new and useful Improvements in Power-TransmittingMechanisms, of which the following is a specification.

My invention relates to power transmitting mechanism and its noveltyconsists in the construction and adaptation of the arts as will be morefully hereinafter ointe out.

In United States Letters atent No. 873,838, ranted to me December 17,1907, I described a power transmitting mechanism comprising two pulleys,a driving ulley and a driven pulley, the former provi ed with a lateralannular flan e and a yielding surface, whereby ressure 0% such surfaceagainst the driven pu ley caused the lateral flange to roject inwardlyto engage such pulley, by rictional contact.

The subject matter of the present application is an improvement upon theinvention described in the patent above referred to, the pulleys beingprovided with similarly placed projections and indentations whereby alocking engagement ensues between them when the Contact between thepulleys becomes close.'

It also comprises means for-ener izing the motor by which the drivingpull ey is actuated and simultaneously disengaging a brake normally inosition to act against the driven pulley to ho id it at rest.

In the drawings, Figure 1 is an elevation of a sewing machine, a motorand a form of power transmitter embodyin my invention;

ig. 2 is an end view thereo looking to the left from the plane of theline 2-2 in Fi 1 Fig. 3 is a central section of one form 0 the drivingulley and Fig. 4 is an end View thereof; ig. 5 is a central section of amodified form of the driving pulley and of thelower ortion of the drivenpulley; Fig. 6 is an enarged elevation of a art of the drivenjpulleyshown in Fig. 5 a ong its engaging rim, and Fi 7 is a section thereof onthe. plane of the Iine 77 in Fig. 6. Fig. 8 is an enlarged elevation ofa part of the driving pul ley shown in Fig. 5 along its enga ing rim andFig. 9 is a section thereof on t e plane of the inc 99 in Fig. 8, andFig. 10 is a view similar to Fig. 2 showing .thepulleys disengaged andthe switch open. 7

In the drawings, 1 represents a motor which may be of any approved styleor construction, but which is lpreferably of an or dinary type ofelectrica motor, and 2 is its shaft. It is provided with a base 3mounted to oscillate in standards 4 and its base is so arranged withrespect to these standards that its center of gravity is beyond,oroutside of,

the center line of the base, or to the left of this center line when theparts are in the positions shown in Figs. 2 and 10. A spring 5 serves toassist the force of ravity to draw downwardly that portion 0? the motor,or motor frame, to which it is attached. De,- pending from the motor isa switch arm 6 adapted to contact with a conductor 7 leading to a sourceof suitable electrical energy (not shown) when the motor is in operativeposition as shown in Fig. 2), but swung away and out of contacttherewith when the arts are not in operative position (as shown in Fig.10).

10 1s a driving pulley mounted on a shaft 2 of the motor and 11 is thedriven pulley which is mounted on the shaft 12 of the machine adapted tobe actuated thereby. In the drawings I have re presented this machine asa sewing machine, but it may be a printing press, or any other lightrunning machine.

13 is a brakeshoe mounted on a bracket 14 secured to, or made integralwith, the motor frame and moving in unison with the switch bar 6, orrigidly secured to it.

15 is a dependent rod hinged to the bracket 14 and terminating at itslower extremity in a pedal or hand-hold (not shown) or some similardevice whereby it can be moved by the o orator.

In igs. 3 and 4, I have illustrated the form of pulley forming thesubject matter of my Letters Patent of the United States above referredto, and which forms no art of this invention, but which is brieflyrescribed in order that the improvement thereon may properly beunderstood. In these figures, 20 is an inner sleeve preferably made intwo parts and secured to theshaft 2 by set screws 21, or in any otherusual manner. Mounted on this sleeve, or directly upon the shaft, if.

desired are two carriers 22, each made of light flexible elastic metal,such as sheet steel, and referably cut into a. star like form, withradia arms 23 (as shown, especially in Fig. 4). Screws 24 serve tosecure the carrier to the sleeve 20. Secured in turn to each carrier bybolts 25 is a conical drum 26 with its base, or larger end, turnedinwardly and rovided at its outer end with a lateral annuar flange 27.These drums may be made of any suitable size and material. I refer tomake them of rings 28 of leather held in place by the bolts 25. When thedriving pulley and the driven pulley are brought together (as shown, forexam le, in Fig. 5) the outer rim of the driven pg ey 11, contactingwith the outer rim of the drums 26 of the driving pulley 10, the drumsare ressed inwardly, and being mounted on the exible carriers 22, areressed in that direction and move inwar ly until the lateral flanges 27contact, with the sides of the driven pulley and a firm frictionalengagement takes place between them.

In Fi s. 5 to 9, there is'shown an improvement w ereby a locking engaement is secured between the pulleys in addition to the frictionalengagement resulting from the construction shown in Fig. 3. In theseFigs. 5 to 9, 30 indicates the outer side of the driven ulley 10.Parallel to and slightly back rom the edge 31 of this pulley, 1s a rowof teeth 32, preferably radially disposed and rejecting outward y fromthe side 30. 40 indicates the inner side-of the lateral flange 27 on thedriving ulley. Parallel to and slightly back from t e edge 41' of thisflange, is a row of indentations 42 radially disposed and correspondingin size and number to the teeth 32 on the driven pulley. The purpose ofthis construction is to secure a more certain enga ement between the twopulleys. As the pu leys engage in the manner above described, and theproper surfaces are brought into closer and closer contact, finally theinward movement of the annular flange on the driven ulley will cause theteeth 32 to engage with t e indentations 42 to make a ositive lockingengagement of the two puleys while they are under such speed conditionsthat the annular flan e of the driving pulley and the rim of the dnvenpulley are in sufficiently close contact to enable this to take place.As the speed slackens, or the pulleys are caused to disengage, the teeth32 readi y disengage from the indentations 42 and the frictionalengagement of the surfaces 31 and 40 alo eremain, and as the speedbecomes less t ese surfaces are finally disenga ed and the transmissionof power ceases. rem the construction above referred to,

automatically just as soon as the pulleys are brought into contact. Whenthe parts are in inoperative positions, (as shown in Fig. 10), the brake13- is against the rim of the driven pulley and is held by the weight ofthe motor which is to the left of the center of its base. This movementis assisted by the tension of the spring 5. At the same time the switcharm 6 is out of contact with the energizing conductor 7. Now, if the oerator pulls down upon the rod 15, either by is foot or his hand, suchmovement tends to oscillate the motor into the position shown in Fig. 2.By this movement the brake 13 is simultaneously removed from contactwith the driven pulley and the switch-arm 6 is brought into contact withthe energizing conductor 7, the motor is thereby energized and thepulleys brought into contact, as has been heretofore described, andthereby the energy of the motor is communicated-from them to the machineactuated from the shaft 12.

Having described my invention, what I claim as new is 1. The combinationwith a base or sup ort, of a motor, a shaft mounted thereon, a rivingpulley on the shaft, a machine, a shaft mounted thereon parallel withthe motor shaft, a driven pulley thereon, and a pivotal sup ortconnecting the motor with the base, sai pivotal support being parallelwith the shafts of the motor and the machine and located in a verticalplane between the vertical planes of said shafts.

2. The combination with a base or support, of a motor, a shaft mountedthereon, a driving pulley on the shaft, a machine, a shaft FREDERICKBUCHERER.

Witnesses HERMAN MEYER,

it will be seen that power is transmitted from the driving to the rivenpulley at once and ALAN C. MCDONNELL.

mounted thereon parallel with the motor

